Natural Insecticide
Mostrando 1-12 de 43 artigos, teses e dissertações.
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1. Metabolization of Insecticidal Amides from Leaves of Piper tuberculatum by Heraclydes hectorides and Naupactus bipes
Amides have been recognized as potent insecticidal natural products but, despite their variety of targets and mechanisms of action, their metabolic fate in insects is virtually unknown. The currently accepted hypothesis is that specialist herbivores are capable of biotransforming xenobiotics rendering them more polar and excretable while generalist insects d
J. Braz. Chem. Soc.. Publicado em: 2020-04
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2. Current vector control challenges in the fight against malaria in Brazil
Abstract In Brazil, malaria is an important public health problem first reported in 1560. Historically, fluctuations in malaria cases in Brazil are attributed to waves of economic development; construction of railroads, highways, and hydroelectric dams; and population displacement and land occupation policies. Vector control measures have been widely used wi
Rev. Soc. Bras. Med. Trop.. Publicado em: 07/03/2019
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3. Bioactivity of essential oils from Artemisia against Diaphania hyalinata and its selectivity to beneficial insects
ABSTRACT: The demand for effective insecticides in pest control with low toxicity to the non-target organisms, such as natural enemies and pollinators, is increasing steadily. A good alternative for synthetic insecticides is natural compounds, including essential oils (EO). This work assessed toxicity of essential oils extracted from Artemisia annua, A. absi
Sci. agric. (Piracicaba, Braz.). Publicado em: 2018-12
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4. Electrochemical and Quantum Chemical Investigations of the Insecticide Fipronil
This work describes an electrochemical and quantum chemical investigation of the fipronil insecticide. Cyclic voltammetry (CV) and square wave voltammetry (SWV) experiments were performed over a graphite-polyurethane (GPU) composite electrode. The fipronil molecule presents an one-electron irreversible oxidation reaction. Profiting the SWV signal a square wa
J. Braz. Chem. Soc.. Publicado em: 2016-05
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5. Contrasting patterns of insecticide resistance and knockdown resistance (kdr) in Aedes aegypti populations from Jacarezinho (Brazil) after a Dengue Outbreak
ABSTRACT After a dengue outbreak, the knowledge on the extent, distribution and mechanisms of insecticide resistance is essential for successful insecticide-based dengue control interventions. Therefore, we evaluated the potential changes to insecticide resistance in natural Aedes aegypti populations to Organophosphates (OP) and Pyrethroids (PY) after chemic
Rev. Bras. entomol.. Publicado em: 2016-03
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6. Susceptibility of Triatoma sordida Stal, 1859 (Hemiptera: Reduviidae) to alpha-cypermethrin under natural climatic conditions
Abstract:INTRODUCTION:Despite the recommendations by interpretation of resistance ratios obtained in laboratory bioassays, little is known about the actual impact of these results in the effectiveness of vector control activities in the field. In this context, our objective was to determine the mean value of different resistance ratios obtained by laboratory
Rev. Soc. Bras. Med. Trop.. Publicado em: 2015-08
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7. Insecticide resistance and genetic variability in natural populations of Aedes (Stegomyia) aegypti (Diptera: Culicidae) from Colombia
Mosquito control prevails as the most efficient method to protect humans from the dengue virus, despite recent efforts to find a vaccine for this disease. We evaluated insecticide resistance and genetic variability in natural populations of Aedes aegypti (Linnaeus, 1762) from Colombia. This is the first Colombian study examining kdr mutations and population
Zoologia (Curitiba). Publicado em: 2015-02
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8. Potential Insecticidal Activity of Steroidal C-17 Pyrazolinyl Derivatives
Agrochemical research, over the last two decades, has resulted in the discovery of chemically novel insecticides, of which steroids-based compounds that mimic the action of hormones have been considered as safe insecticides. In this study, eight steroidal C-17 pyrazolinyl derivatives were resynthesized through molecular hybridization and their insecticidal a
J. Braz. Chem. Soc.. Publicado em: 2015-02
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9. Toxicological and biochemical analysis of the susceptibility of sylvatic Triatoma infestans from the Andean Valley of Bolivia to organophosphate insecticide
To increase our knowledge of the natural susceptibility of Triatoma infestans to an organophosphate insecticide, we performed toxicological and biochemical studies on three sylvatic populations from Bolivia and two populations from domestic dwellings from Bolivia and Argentina. Fifty-per-cent lethal doses (LD50) were determined based on the topical applicati
Mem. Inst. Oswaldo Cruz. Publicado em: 2013-09
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10. Efeito da resistência de Spodoptera frugiperda (J.E.Smith, 1797) (Lepidoptera: Noctuidae) a lambda-cyhalothrin na interação com o milho geneticamente modificado (MON810) e na resposta imunológica ao parasitismo por Campoletis af / Effect of resistance of Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) to lambda-cyhalothrin on the interaction with genetically modified maize (MON810) and the immune response to parasitization by Campoletis aff. flavicincta (Hymenoptera: Ichneumonidae)
Fitness costs of insect resistance to insecticides can be exploited by integrating other pest control strategies in Integrated Pest Management (IPM) programs. The objective of this research was to evaluate the existence of fitness costs associated with the resistance of Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) to the pyrethroid insecticid
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/05/2012
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11. Aedes aegypti survival in the presence of Toxorhynchites violaceus (Diptera: Culicidae) fourth instar larvae
The mosquito Aedes aegypti (Linnaeus, 1762) is the main vector of dengue and yellow fever viruses. Different methods have been used to control A. aegypti, including chemical and biological tools. However, chemical control can lead to a subsequent increase in the mosquitoes' insecticide resistance, and biological control represents an important method as an a
Zoologia (Curitiba). Publicado em: 2011-08
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12. Atividade inseticida do extrato das folhas de Piper hispidum (Piperaceae) sobre a broca-do-café (Hypothenemus hampei).
Este trabalho teve como objetivo avaliar o potencial inseticida do extrato acetônico das folhas de Piper hispidum Kunth sobre Hypothenemus hampei (Ferrari, 1867) em aplicação tópica, superfície contaminada e efeito de repelência. Adotou-se as diluições de 25,0; 5,0; 0,1; 0,02; 0,004 e 0,0008 mg mL-1 para exposição em superfície contaminada e aplic
Separata de: Revista Brasileira de Botânica. Publicado em: 2011